新疆博格达山前断层相关褶皱的三维构造建模及应变分析

项目名称： 新疆博格达山前断层相关褶皱的三维构造建模及应变分析

项目编号： No.41202145

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 天文学、地球科学

项目作者： 李一泉

作者单位： 南京大学

项目金额： 25万元

中文摘要： 断层相关褶皱研究的发展方向是从二维向三维的转化，本研究拟选择博格达山前褶皱冲断带为研究对象展开三维构造建模和应变恢复工作，旨在为三维断层相关褶皱理论和建模提供一个实例分析。北天山及前陆盆地复杂的构造演化导致多期构造叠加，并且新生代构造还处于强烈的活动中，具有地震灾害的潜在危险性。本研究基于大量高精度二维和三维地震反射数据、井资料、历史地震数据、地质图以及野外测量结果进行博格达山前三维构造建模，旨在实现对该区构造几何学研究的定量化、精细化，认识北天山山前和准东前陆盆地新生代构造变形方式和规律，为该区活动构造的研究和地震灾害的评估提供依据，并约束和检验该区中生代以来构造演化历史。进一步结合三维应变恢复预测准东盆地有限应变和裂缝的分布状态，以期探讨博格达山前构造动力学状态。

中文关键词： 三维建模；断层相关褶皱；油气勘探；活动构造；博格达

英文摘要： The trend of fault-related fold research is the transition from 2D to 3D. In this study, the construction of 3D structural and restoration model of the fold-and-thrust belt along the Bogda mountain front provides a real case for the 3D fault-related-fold theory and modeling. The multiphase tectonic evolution in the northern Tianshan and foreland basin results in complicated structural superposition and structural activity in the Cenozoic with potential earthquake hazards. In this study, on basis of integrated data including high quality industrial 2D and 3D seismic reflection sections, well data, historical earthquakes, geological map, as well as field observations, we will build the 3D structural and restoration model of structures along the Bogda Mountain Front, which will realize the quantification and refinement of the structural geometry. The 3D structural model will reveal the structural deformation pattern and characteristics, which will serve the scientific community as a basis for the study of active structures and comprehensive probabilistic seismic hazard assessment. Furthermore, it can constrain and verify the tectonic evolution of the Tianshan fold-thrust-belt. In addition, the 3D restoration model can also predict the distribution of the finite strain and the characteristic of cracks, which provide

英文关键词： Three dimensional modeling；Fault-related fold；Oil and gas exploration；Active structure；Bodga